MC33260DG ON Semiconductor, MC33260DG Datasheet - Page 19

• Manufacturer Part Number: MC33260DG
• Description: IC PFC CONTROLLER DCM 8SOIC
• Manufacturer: ON Semiconductor
• Series: GreenLine™r

Specifications of MC33260DG

• Mode: Discontinuous Conduction (DCM)
• Current - Startup: 100µA
• Voltage - Supply: 11 V ~ 16 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MC33260 V
must be implemented to supply the circuit. A startup resistor
is connected between the rectified voltage (or one- -half
wave) to charge the MC33260 V
threshold (11 V typically). The MC33260 turns on and the
V
transformer auxiliary winding. A resistor, r (in the range of
22 Ω) and a 15 V Zener should be added to protect the circuit
from excessive voltages.
CC
In some applications, the arrangement shown in Figure 38
capacitor (C
1
2
3
4
CC
SUPPLY VOLTAGE
D1...D4
pin8
Figure 39. Preconverter Loaded by a Flyback SMPS: MC33260 V
) starts to be charged by the PFC
8
7
6
5
Preconverter Output
+
V
CC
CC
1
2
3
4
up to its startup
Figure 38. Circuit Supply Voltage
SMPS Driver
8
7
6
5
http://onsemi.com
15 V
V
CC
+
19
+
MC33260 should preferably be supplied by the SMPS itself.
In this configuration, the SMPS starts first and the PFC gets
active when the MC33260 V
supply, exceeds the device startup level. With this
configuration, the PFC preconverter doesn’t require any
auxiliary winding and finally a simple coil can be used.
PCB LAYOUT
should be as short as possible.
R
C
stup
When the PFC preconverter is loaded by an SMPS, the
The connections of the oscillator and V
pin8
r
PDIP- -8 CONFIGURATION SHOWN
DIP- -8 CONFIGURATION SHOWN
+
+
+
CC
Supply
CC
+
+
supplied by the power
control
+
capacitors